Heat transfer and pressure drop in microchannels with random roughness

Pelevic, Nikola; Meer, Theodorus H. van der

doi:10.1016/j.ijthermalsci.2015.08.012

Cited by 41 publications

(29 citation statements)

References 47 publications

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“…It is a well-known fact that roughness affects friction factor significantly and it has been researched widely. A recent numerical study of Pelevic and Meer [24] shows that an increase in relative roughness by 2.93 % increases friction factor by 7 %. Correspondingly, the higher friction factor values are considered to be an accumulation of the presence of the fins and possible roughness effect in this study.…”

Section: Friction Characteristicsmentioning

confidence: 96%

Experimental Analysis of Laminar Flow and Heat Transfer in Multi-Port Finned Mini-Channel

2016

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Section: Friction Characteristicsmentioning

confidence: 96%

Experimental Analysis of Laminar Flow and Heat Transfer in Multi-Port Finned Mini-Channel

2016

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“…So other regimes such as slip flow (0.001 < Kn < 0.1), transient (0.1 < Kn < 10), and free molecular regime (Kn > 10) should be considered rather than continuum (Kn < 0.001) . In these cases, Navier–Stokes equations with modified wall boundary conditions, Lattice Boltzmann, or molecular dynamic methods can be applied …”

Section: Introductionmentioning

confidence: 99%

Prediction of flow and heat transfer through a microtube filled with bidisperse porous medium under local thermal nonequilibrium condition

et al. 2020

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In this paper, the thermal and hydrodynamic solutions of a microtube filled with bidisperse porous medium (BDPM) under the local thermal nonequilibrium (LTNE) condition are presented. Considering the LTNE condition, the energy equations have been numerically solved. The rarefaction effects are considered for Knudsen numbers ranging from 0 to 0.1; therefore, first-order boundary condition is applied on the wall. The temperature distribution of each phase is examined with respect to the involved parameters in the BDPM system. For the first time, the Nusselt number ratio (NRDP) is introduced to study the influence of Darcy number on the Nusselt number more precisely. Also, the effect of different thermophysical parameters on the Nusselt number is studied. The advantage of BDPM system over monodisperse porous medium (MDPM) structure is examined through the heat transfer performance parameter. The findings exhibit a good agreement with the literature. Also, the LTNE condition produces more realistic results in comparison to local thermal equilibrium assumption. On the whole, although implementing the BDPM enhances the heat transfer rate compared with the MDPM, it does not improve the thermal hydrodynamic performance significantly. K E Y W O R D S bidisperse porous medium, forced convective heat transfer, local thermal nonequilibrium, microtube, rarefaction effect

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“…According to their results and the capability of MPL model in the correctly prediction of apparent viscosity of non-Newtonian uids in the whole region of shear rate from zero to in nity, they recommended MPL model to be used in similar cases. Pelevi and VanderMeer [31] used the lattice Boltzmann method for the rst time to investigate in uence of three-dimensional surface roughness on uid ow and heat transfer phenomena within a microchannel. It was found that the Gauss function is an e cient and convenient method to build the roughness rather than the other models.…”

Section: Introductionmentioning

confidence: 99%

Investigation of fluid flow and heat transfer of compressible flow in a constricted microchannel

Heydari

2016

Scientia Iranica

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Heat transfer and hydrodynamics of air ow in a constricted microchannel are numerically investigated by considering the e ect of geometry, stagnation pressure and temperature at the inlet, and applied heat ux at the walls. Kurganov-Tudmor method is used to solve the governing equation; Maxwell and Smoluchowski approaches are used to model the rarefaction e ects of compressible micro ow. This study shows that using slip model is necessary in both high-speed and low-speed ows, especially at the downstream of the constricted portion. Also, throat height reduction results in more rarefaction and compressibility at the constricted region.

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Heat transfer and pressure drop in microchannels with random roughness

Cited by 41 publications

References 47 publications

Experimental Analysis of Laminar Flow and Heat Transfer in Multi-Port Finned Mini-Channel

Experimental Analysis of Laminar Flow and Heat Transfer in Multi-Port Finned Mini-Channel

Prediction of flow and heat transfer through a microtube filled with bidisperse porous medium under local thermal nonequilibrium condition

Investigation of fluid flow and heat transfer of compressible flow in a constricted microchannel

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